Abstract
In the RoboCup Soccer Middle Size Robot League, a cooperative pass behavior is very important play to develop a team strategy.In this paper, we propose a pass system considering an obstructive behavior for the RoboCup. We propose a pass situation judgmentalgorithm by using both the Dominant Region Method for estimation of an obstructive behavior of an enemy robot and the anti-interferencemodel by action potentials. The experimental results to confirm the usefulness of the proposed algorithm are reported.